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Collapsing three-dimensional convex polyhedra: correction

Published online by Cambridge University Press:  24 October 2008

D. R. J. Chillingworth
Affiliation:
University of Southampton

Extract

An ingenious construction due to Connelly and Henderson (2) has shown that there exists a rectilinearly triangulated convex polyhedron P in having the property that at least one vertex of the triangulation lies in the interior of a face of P, and yet there is no isomorphic triangulation of a convex polyhedron P′ all of whose vertices are vertices of P′. Thus the assertion beginning on the top line of p. 354 of (1) is false, which leaves a gap in the proof of essentially the main result of (1), namely that any rectilinearly triangulated convex polyhedron incan be simplicially collapsed onto its boundary minus a 2-simplex σ. The purpose of this note is to show that the theorem is nevertheless still true. In any case the Corollaries 2 and 3 in (1) are unaffected by the error.

Type
Research Article
Copyright
Copyright © Cambridge Philosophical Society 1980

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References

REFERENCES

(1)Chillingworth, D. R.J. Collapsing three-dimensional convex polyhedra. Proc. Camb. Phil. Soc. 63 (1967), 353357.CrossRefGoogle Scholar
(2)Connelly, R. and Henderson, D. W.A convex 3-complex not simplicially isomorphic to a strictly convex complex. Math. Proc. Cambridge Philos. Soc. 88 (1980), 299306.CrossRefGoogle Scholar